Marking system
US6124377A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1998 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Jul 1, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/17
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A marking system that advantageously minimizes messiness during use is disclosed. The marking system comprises a marking composition comprising at least one color precursor in the form of a leuco dye. A marking instrument can be utilized to store the marking composition and/or apply the marking composition to a desired substrate. The substrate is provided with a coating comprising at least one color-triggering developer. Upon application of the leuco dye to the substrate, a chromophore, and hence, color, is formed. If, however, color is inadvertently triggered on an unintended surface, thereby resulting in an unwanted stain, the stain can be readily removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.